REPORT ON THE ANNELIDA. 
475 
Polycirrus, GruLe. 
Polycirrus kerguelensis, n. sp. (PI. XXVIIIa. fig. 22). 
Habitat. — Dredged at Station 149h (off Christmas TParbour, Kerguelen), January 29, 
1874; lat. 48° 45' S., long. 69° 14' E ; depth, 127 fathoms; surface temperature, 39°’8 ; 
sea-bottom, volcanic mud. 
A fragment of the anterior end of a small specimen, measuring aljout 5 mm. in length, 
and barely 1 mm. in diameter at its widest part, toward the snout. 
The condition of the specimen is such that all that can be said of it is that the 
general aspect agrees with Polycirrus, and that the hooks occur well forward, a feature 
having the same import. In structure the bristles corresj)ond with the same typical 
form, presenting a slight dilatation in the region beyond the shaft, and then diminishing 
toward the tip, which is minutely serrated as in Ereutho. 
The hooks (PI. XXVIIIa. fig. 22) possess three teeth, the great fang and two above 
it. The anterior inferior angle is much produced, forming a long process with a slight 
curve upward. The angle made by the great fang with the latter is large. The hook 
approaches that of Poly cirrus aurantiacus, though, judging from Malmgren’s figure, the 
species from Kerguelen has a longer basal region. It diverges in the same manner from 
the Polycirrus nervosus of Marenzeller from Southern Japan. The absence of the minute 
characters of the hooks in Grube’s Polycirrus boholensis from the Philippines prevents 
definite diagnosis. The hook, again, of Poly cirrus hcematodes, ClaparGle,^ especially as 
shown by Langerhans ^ (since Claparede’s figure is too small for accuracy) from Madeira, 
is closely allied. 
Ehlersiella,^ n. gen. 
Ehlersiella atlantica, n. sp. (PI. XXVIIIa. figs. 26, 27). 
Habitat. — Trawled at Station 63 (Mid Atlantic, between Bermuda and the Azores), 
June 19, 1873; lat. 35° 29' N., long, 50° 53' W. ; depth, 2750 fathoms; surface 
temperature, 71°'0 ; sea-bottom, red clay. 
Also dredged at Station 76 (off the Azores), July 3, 1873 ; lat. 38° 11' N., 
long. 27° 9' W.; depth, 900 fathoms; bottom temperature 40°'0, surface tempera- 
ture 70°’0 ; sea-bottom, Pteropod ooze. 
From the first-named Station several fragments of the posterior region of this some- 
what small species were procured, measuring 11 mm. in length and about 1 mm. in 
^ Glanures, p. 25, pi. ii. fig. 1/3. ^ Zeitschr. f. wiss. Zool., Bd. xl. p. 265, Taf. xvi. fig. 26. 
® Named in honour of Prof. Ehlers of Gottingen, whose laborious and valuable researches amongst the Annelid.? 
are well known. 
